Hi Annabelle,
My link with Eliza Isley Kelly is actually through marriage, but I am still interested as to where Isley Blou is!
Eliza's daughter (Martha Robinson born 1850 in Stockton on Tees) married George Groskop in 1866. Their eldest son, Henry Groskop, married Annie May in 1891. Before Annie married Henry she had an illegitimate daughter Rica Aileen in 1885. Rica Aileen Stockdale May is my Great Grandmather, she died in 1922.
Just recently I had a suggestion as to where Isley Blou might be.
"Isley Blou could be Isla de Leon - the island of Leon, just down the caost from Cadiz. Looking at the 1851 census page, the enumerator's "n" sometimes lookes like a "u" and the B could actually be a D. The British Army was out there fighting the Peninsular War with the Spanish & Portugese against the French from about 1810-1814 ish. If you anglicise the Spanish place name, you quite possibly come up with the phonetic place where she might have been born, (Isley=Isla. Dlon=De Leon . . . . Isla de Leon". What do you think?
Regards
Stu